I believe they will eventually simply start making the games English only and give you the ability to download your desired language when you install the game.
Because as we know, dialogue and extra languages are the reason why certain games exceeded the 30Gb mark last gen.
I remember myself ripping some PS3 games last gen just for fun and realizing that I was able to cut around 15Gb just in Audio files that I will never need. (The audio is not blended with the video, so they are very easy to locate and remove)









